Affiliation: | (1) Genome Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263, Japan, JP;(2) Genome Science Laboratory and Division of Experimental Animal Research, RIKEN Tsukuba Life Science Center, The Institute of Physical and Chemical Research (RIKEN), 3-1-1 Koyadai, Tsukuba, Ibaraki 305, Japan, JP |